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FACULTY OF PHYSICS

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2024-11-23 18:01

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Conference: Bucharest University Faculty of Physics 2009 Meeting

Section: Solid State Physics and Materials Science

Title:

Production and characterization of hybrid photovoltaic cells based on CdTe nanowire arrays and organic dyes thin films

Authors:

Camelia Florica(1), T. Mitran(1), Cristina Besleaga(1),C. Tazlaoanu(1), L. Ion(1), I. Enculescu(2), V. A. Antohe(1), A. Radu(1), M. Radu(1), G. Chisulescu(1), S.Antohe(1)

Affiliation:

1) Faculty of Physics, University of Bucharest, P.O.Box MG-11, Magurele, Ilfov, 077125 Romania

2) National Institute of Material Physics, 105 bis Atomistilor street, Magurele, Ilfov, P.O.Box MG-7, 077125 Romania

E-mail

santohe@solid.fizica.unibuc.ro

Keywords:

CdTe, nanowires, XRD, SEM, hybrid organic/inorganic structures

Abstract:

In the past decade a new class of photovoltaic structures has emerged, based on both inorganic and organic semiconductors. The aim is to exploit the favorable physical properties of both types of semiconductors. This class of photovoltaic cells – hybrid cells – also includes the new structures where multiple exciton generation takes place, a process that has created much recent interest[1]. The problem is finding a way to convert these multiple excitons into (photogenerated) charge carriers. A possible solution consists in using inorganic nanomaterials. Along this path, in this paper a new approach is proposed for obtaining hybrid inorganic/organic photovoltaic structures, based on CdTe nanowires and organic dye films. An array of CdTe nanowires (10^9 wires/cm^2) was electrochemically grown by using a template method. After dissolving the polycarbonate template, a thin (300 nm) CdTe film has been deposited by thermal vacuum evaporation onto the nanowire array before they were coated with the TPyP film. The structural, morphological, electrical and optical properties of each component layer are investigated. Typical parameters of the prepared photovoltaic structures are determined and their performances are discussed.